Bortnikovite
A valid IMA mineral species
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Formula:
Pd4Cu3Zn
Colour:
steel-white
Lustre:
Metallic
Specific Gravity:
11.16 (Calculated)
Crystal System:
Tetragonal
Name:
Named in honor of Professor Nikolai Stefanovich Bortnikov (Николай Стефанович Бортников) (b. 25 March 1946, Bolshaya Kazinka, Voronezh Region, USSR), prominent Russian mineralogist and researcher of ore deposits and a corresponding member of the Russian Academy of Sciences. He was Director of the Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Science (now IGEM).
The first platinum group mineral that contains Zn as a major mineral-forming element. Its origin is related to the effect of alkaline fluid on ultramafic rocks.
Unique Identifiers
Mindat ID:
30763
Long-form identifier:
mindat:1:1:30763:5
GUID
(UUID V4):
(UUID V4):
a3ddd155-6ed6-4680-a1c8-b15c2d197774
IMA Classification of Bortnikovite
Approved
Approval year:
2006
First published:
2007
Classification of Bortnikovite
1.AG.65
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
G : PGE-metal alloys
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
G : PGE-metal alloys
Dana 7th ed.:
1.2.3.4
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Bnk | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Bortnikovite
Metallic
Transparency:
Opaque
Colour:
steel-white
Hardness:
VHN50=368 kg/mm2 - Vickers
Tenacity:
Malleable
Cleavage:
None Observed
Density:
11.16 g/cm3 (Calculated)
Optical Data of Bortnikovite
Reflectivity:
Wavelength | R |
---|---|
400nm | 63.2% |
420nm | 57.0% |
440nm | 54.7% |
460nm | 55.8% |
470nm | 56.9% |
480nm | 58.0% |
500nm | 59.4% |
520nm | 60.5% |
540nm | 61.4% |
546nm | 61.7% |
560nm | 62.2% |
580nm | 63.1% |
589nm | 63.4% |
600nm | 63.7% |
620nm | 64.2% |
640nm | 64.8% |
650nm | 65.4% |
660nm | 65.9% |
680nm | 66.9% |
700nm | 68.6% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 68.6%.
Colour in reflected light:
White with a slight grayish beige tint.
Chemistry of Bortnikovite
Mindat Formula:
Pd4Cu3Zn
Elements listed:
Crystallography of Bortnikovite
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P4/mmm
Setting:
P4/mmm
Cell Parameters:
a = 6.00(2) Å, c = 8.50(3) Å
Ratio:
a:c = 1 : 1.417
Unit Cell V:
306.00 ų (Calculated from Unit Cell)
Z:
4
Comment:
Assumption of tetragonal cell; Space Group probable
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.00 Å | (1) |
2.67 Å | (1) |
2.13 Å | (10) |
1.737 Å | (1) |
1.501 Å | (3) |
1.346 Å | (2) |
1.224 Å | (8) |
1.059 Å | (4) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 3a: Earth’s earliest Hadean crust | >4.50 |
7 : Ultramafic igneous rocks |
Type Occurrence of Bortnikovite
General Appearance of Type Material:
Metallic overgrowth rims of approximately 50–150 μm on larger isoferroplatinum grains.
Place of Conservation of Type Material:
Mineralogical Museum at the St. Petersburg State University, Russia
Geological Setting of Type Material:
Unique placer deposit derived from a concentrically zoned alkaline ultramafic massif.
Associated Minerals at Type Locality:
Reference:
Mochalov, A., Tolkachev, M., Polekhovsky, Yu., Goryacheva, E. (2007) Bortnikovite, Pd4Cu3Zn, a new mineral species from the unique Konder placer deposit, Khabarovsk krai, Russia. Geology of Ore Deposits: 49: 318-327.
Synonyms of Bortnikovite
Related Minerals - Strunz-mindat Grouping
1.AG. | Michitoshiite-(Cu) | Rh(Cu1-xGex) |
1.AG. | Palladothallite | Pd3Tl |
1.AG. | Sluzhenikinite | Pd15(Sb7-xSnx) |
1.AG. | Driekopite | PtBi |
1.AG. | Sidorovite | Fe3Pt |
1.AG.05 | Hexaferrum | (Fe,Os,Ru,Ir) |
1.AG.05 | Garutiite | (Ni,Fe,Ir) |
1.AG.10 | Atokite | (Pd,Pt)3Sn |
1.AG.10 | Rustenburgite | (Pt,Pd)3Sn |
1.AG.10 | Zvyagintsevite | Pd3Pb |
1.AG.15 | Taimyrite | (Pd,Cu,Pt)3Sn |
1.AG.15 | Tatyanaite | (Pt,Pd,Cu)9Cu3Sn4 |
1.AG.20 | Paolovite | Pd2Sn |
1.AG.25 | Plumbopalladinite | Pd3Pb2 |
1.AG.25 | Stannopalladinite | (Pd,Cu)3Sn |
1.AG.30 | Cabriite | Pd2CuSn |
1.AG.35 | Chengdeite | Ir3Fe |
1.AG.35 | Isoferroplatinum | Pt3Fe |
1.AG.40 | Ferronickelplatinum | Pt2FeNi |
1.AG.40 | Tetraferroplatinum | PtFe |
1.AG.40 | Tulameenite | Pt2CuFe |
1.AG.45 | Hongshiite | PtCu |
1.AG.45 | Skaergaardite | PdCu |
1.AG.50 | Yixunite | Pt3In |
1.AG.55 | Damiaoite | PtIn2 |
1.AG.60 | Niggliite | PtSn |
1.AG.70 | Nielsenite | PdCu3 |
1.AG.75 | Norilskite | (Pd,Ag)2xPb (x = 0.08 - 0.11) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Bortnikovite
mindat.org URL:
https://www.mindat.org/min-30763.html
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References for Bortnikovite
Reference List:
Localities for Bortnikovite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| Mochalov et al. (2007) |
| Groshev +6 other references |
| Vymazalová et al. (2020) |
| Mikhailov et al. (2021) |